Recent content by ridefst

5HP isn't a problem for a manual motor switch - it looks like a light switch, but does break both lines. http://www.mcmaster.com/#7657k36

You would have to maintain one of the single phase services to run all the 120/240 items that you currently have - or else buy a transformer to step the 277/480 3-phase down to 120/240. The transformer would be expensive, so you'd likely end up with two services still, one single and one three...